期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
Attenuation of coda waves and Q_c value beneath the Chengdu telemetered seismic network
1
作者 曾健 陈天长 +5 位作者 韩渭宾 范军 郑斯华 长谷川昭 堀内茂木 松本聪 《Acta Seismologica Sinica(English Edition)》 CSCD 1997年第3期26-33,共8页
Based on the single scattering model of coda power spectrum analysis, digital waveform data of 50 events recorded by the real time processing system of the Chengdu telemetry network are analyzed to estimate the Q ... Based on the single scattering model of coda power spectrum analysis, digital waveform data of 50 events recorded by the real time processing system of the Chengdu telemetry network are analyzed to estimate the Q c values of earth medium beneath the Chengdu telemetry network for several specified frequencies. It is found that the Q c shows the frequency dependency in the form of Q c= Q 0 f n in the range of 1.0 to 20.0Hz. Estimated Q 0 ranges from 60.83 to 178.05, and n is found to be 0.713 to 1.159. The average value of Q 0 and n are 117 and 0.978 respectively. This result indicates the strong frequency dependency of the attenuation of coda waves beneath the Chengdu telemetry network. Comparing with the results obtained in other regions of the world, it is found that Q 0 1 value and its change with frequency are similar to those in regions with strong tectonic activity. 展开更多
关键词 Chengdu telemetered network CODA Q frequency dependency tectonic activity
下载PDF
Intracranial pressure monitoring in neurosurgery:the present situation and prospects 被引量:3
2
作者 Chenqi He Chubei Teng +3 位作者 Zujian Xiong Xuelei Lin Hongbo Li Xuejun Li 《Chinese Neurosurgical Journal》 CAS CSCD 2023年第3期212-223,共12页
Intracranial pressure(ICP)is one of the most important indexes in neurosurgery.It is essential for doctors to determine the numeric value and changes of ICP,whether before or after an operation.Although external ventr... Intracranial pressure(ICP)is one of the most important indexes in neurosurgery.It is essential for doctors to determine the numeric value and changes of ICP,whether before or after an operation.Although external ventricular drainage(EVD)is the gold standard for monitoring ICP,more and more novel monitoring methods are being applied clinically.Invasive wired ICP monitoring is still the most commonly used in practice.Meanwhile,with the rise and development of various novel technologies,non-invasive types and invasive wireless types are gradually being used clinically or in the testing phase,as a complimentary approach of ICP management.By choosing appropriate monitoring methods,clinical neurosurgeons are able to obtain ICP values safely and effectively under particular conditions.This article introduces diverse monitoring methods and compares the advantages and disadvantages of different monitoring methods.Moreover,this review may enable clinical neurosurgeons to have a broader view of ICP monitoring. 展开更多
关键词 ICP Cerebrospinal fluid Zero drift Wireless telemetering ABSORBABLE NON-INVASIVE
原文传递
Telemetering system and its application for fruit cultivation in greenhouses 被引量:3
3
作者 Zhang Daohui Wang Jiawei +3 位作者 Zong Xiaojuan Wei Hairong Zhu Dongzi Liu Qingzhong 《International Journal of Agricultural and Biological Engineering》 SCIE EI CAS 2013年第2期13-18,共6页
Circuit of the temperature measurement equipment was improved in order to develop temperature telemetering system for cultivating fruit facilities.The traditional temperature measuring equipments used in monitoring te... Circuit of the temperature measurement equipment was improved in order to develop temperature telemetering system for cultivating fruit facilities.The traditional temperature measuring equipments used in monitoring temperature changes in greenhouse include mercury column,merbromine column,kerosene column glass rod thermometer and mechanical inductive thermometer.Compared with the traditional method of temperature measurement the new system reduces the labor requirement and promotes precision monitoring and control of the temperature.In addition,the temperature in the greenhouse was very accurate especially at night or in rainy and snowy weather.This new temperature telemetering system will promote the development of the fruit protection cultivation. 展开更多
关键词 sweet cherry temperature wire telemetering universal instrument temperature measurement and control system
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部